code: def function_definition(self, name, args, is_vector_output):
      self.add_function_def(name, args, is_vector_output)
      yield
      self.add_block_termination()
  
file_path: m2cgen/m2cgen/interpreters/dart/code_generator.py
imports: from contextlib import contextmanager
  from m2cgen.interpreters.code_generator import CLikeCodeGenerator
label_desc: Use image node_id 2 for calling the DartCodeGenerator obj's underlying member method code with example usage: obj.function_definition(name, args, is_vector_output) without return types